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  1. Ghosts of crisis past.Leopold E. Klopfer & Audrey B. Champagne - 1990 - Science Education 74 (2):133-154.
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  2. Issues of science teacher quality, supply, and demand.Audrey B. Champagne & Leslie E. Hornig - 1987 - Science Education 71 (1):57-76.
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  3. The ubiquitous quantities: Explorations that inform the design of instruction on the physical properties of matter.Leopold E. Klopfer, Audrey B. Champagne & Seth D. Chaiklin - 1992 - Science Education 76 (6):597-614.
     
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